st8r00 STMicroelectronics, st8r00 Datasheet - Page 8

• Manufacturer Part Number: st8r00
• Description: Micropower 1a Synchronous Step-up Dc-dc Converter
• Manufacturer: STMicroelectronics

Table 6.
1. For V
2. Guaranteed by design
8/19
V
R
R
V
Symbol
ΔV
ΔV
ΔV
I
I
I
T
START-UP
V
V
T
SUPPLY
LX(leak)
DSON_N
DSON_P
LX(LIM)
FB_OFF
T
f
START
V
D
INH_H
I
SHDN
INH_L
OSC
I
V
Eff
O
O
O
INH
HYS
V
FB
FB
TY
O
/ΔI
/ΔV
/ΔV
I
O
O
I
I
higher than 9V the maximum output current capability is reduced according to LX current limitation
Output voltage
Start-up voltage
Input voltage range
Feedback voltage
Feedback voltage
Feedback current
Supply current
Internal N channel R
Internal P channel R
Internal leakage current
LX current limitation
Oscillator frequency
Max. oscillator duty cycle
Efficiency
Inhibit threshold high
Inhibit threshold low
Inhibit pin current
Thermal shut down
Thermal shut down hysteresis
(2)
Line transient response
Load transient response
Start-up transient
Start-up time
Electrical characteristics for the ST8R00W (V
T
J
= -25°C to 125°C, C
Parameter
(2)
DSON
DSON
I
= C
(1)
I
I
I
V
To be measured at V
load
I
I
V
V
To be measured on LX pin
To be measured on LX pin
I
I
I
V
V
V
V
V
V
V
O
O
O
O
LX
LX
O
O
O
O
FB
LX
LX
I
INH
I
I
I
INH
= 10µF(X7R), L = 4.7µH unless otherwise specified.)
= 50mA
= 0, V
= 50mA, V
= 500mA, V
= 1A, V
= 4 to 6V, I
= 5V, I
= 400mA, V
from 4 to 5.5V, I
from 0 to 5V, I
= 7V
= 400mA
= 400mA
= 4V, V
= 4V
= 0, V
= V
from 0 to 5V, I
INH
I
(2)
O
Test conditions
= 5V
O
INH
from 10mA to 500mA,
FB
= 9V
= 0
O
O
= 2V
= 2V, V
O
I
= 7V
= 50mA
rising
= 9V
O
O
= 500mA
O
= 500mA
I
= 100mA
, V
INH
I
O
= 5V, V
= 0
= 7V, no
(2)
INH
= 2V, I
1.195
Min.
130
-10
0.8
-5
-5
6
4
2
O
= 100mA,
Typ.
1.22
600
300
300
150
500
1.2
10
90
85
90
90
15
3
0
3
1.245
Max.
3.5
0.5
1.4
0.8
12
10
6
2
5
5
%V
%V
%V
MHz
Unit
mA
mΩ
nA
µA
µA
°C
°C
µs
%
%
V
V
V
V
V
A
V
O
O
O